Laboratory of Analytical Chemistry and Applied Ecochemistry, Ghent University, Coupure Links, Ghent, Belgium.
Int J Phytoremediation. 2013;15(7):677-89. doi: 10.1080/15226514.2012.723070.
Short rotation coppice (SRC) of willow and poplar might be a promising phytoremediation option since it uses fast growing, high biomass producing tree species with often a sufficient metal uptake. This study evaluates growth, metal uptake and extraction potentials of eight willow clones (Belders, Belgisch Rood, Christina, Inger, Jorr, Loden, Tora and Zwarte Driebast) on a metal-contaminated agricultural soil, with total cadmium (Cd) and zinc (Zn) concentrations of 6.5 +/- 0.8 and 377 +/- 69 mg kg(-1) soil, respectively. Although, during the first cycle, on average generally low productivity levels (3.7 ton DM (dry matter) ha(-1) y(-1)) were obtained on this sandy soil, certain clones exhibited quite acceptable productivity levels (e.g. Zwarte Driebast 12.5 ton DM ha(-1) y(-1)). Even at low biomass productivity levels, SRC of willow showed promising removal potentials of 72 g Cd and 2.0 kg Zn ha(-1) y(-1), which is much higher than e.g. energy maize or rapeseed grown on the same soil Cd and Zn removal can be increased by 40% if leaves are harvested as well. Nevertheless, nowadays the wood price remains the most critical factor in order to implement SRC as an acceptable, economically feasible alternative crop on metal-contaminated agricultural soils.
短轮伐期柳树和杨树（SRC）可能是一种很有前途的植物修复选择，因为它使用生长迅速、生物量高的树种，通常具有足够的金属吸收能力。本研究评估了八种柳树无性系（Belders、Belgisch Rood、Christina、Inger、Jorr、Loden、Tora 和 Zwarte Driebast）在受金属污染的农业土壤上的生长、金属吸收和提取潜力，土壤中总镉（Cd）和锌（Zn）浓度分别为 6.5 ± 0.8 和 377 ± 69 mg kg(-1)。尽管在这种沙质土壤上，第一个生长周期的平均生产力水平普遍较低（3.7 吨 DM（干物质）公顷（-1）y（-1）），但某些无性系的生产力水平相当可观（例如，Zwarte Driebast 为 12.5 吨 DM 公顷（-1）y（-1））。即使在低生物量生产力水平下，柳树 SRC 也显示出有希望的去除潜力，可去除 72 g Cd 和 2.0 kg Zn ha(-1) y(-1)，这比在同一土壤上生长的能源玉米或油菜的去除量要高得多。然而，如今木材价格仍然是实施 SRC 的最关键因素，以便将其作为一种可接受的、经济可行的受污染农业土壤替代作物。
